Stored Cross-Site Scripting Vulnerability in RT Mega Menu Plugin by WordPress
CVE-2026-14855

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Rt Mega Menu – Mega Menu Builder For Elementor & Gutenberg
Vendor
CVE Published:
18 September 2026

What is CVE-2026-14855?

The RT Mega Menu plugin for WordPress is vulnerable to Stored Cross-Site Scripting through the 'css[left]' parameter due to inadequate input sanitization and output escaping. This issue permits authenticated attackers with Subscriber-level access or higher to inject malicious web scripts. When users access affected pages, these scripts execute, potentially compromising user data and site integrity. Users of versions up to and including 1.5.1 are advised to apply necessary updates and review security practices to mitigate this vulnerability.

Affected Version(s)

RT Mega Menu – Mega Menu Builder for Elementor & Gutenberg 0 <= 1.5.1

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/rt-mega-menu/t...
https://plugins.trac.wordpress.org/browser/rt-mega-menu/t...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mitchell
.